To create a sitemap you can customize your instance without any plugin, so check this documentation which gives the steps in how to display a site map in your Confluence:
You can use Sitemap for Confluence for creating a sitemap.xml.
Using this plugin you can create sitemap.xml to your confluence site and inform search engines about pages on all spaces that are available for crawling.
It also allows to add metadata to the URLs :
Hi Community! We're thrilled to share that Team Calendars for Confluence is now a built-in feature for Confluence Data Center releases 7.11 and beyond. A long time favorite, Team Cale...
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